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/*
* Copyright (c) 2015, Peter Thorson. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the WebSocket++ Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/**
* NOTES
*
* This example uses a number of standard classes through the websocketpp::lib
* namespace. This is to allow easy switching between Boost, the C++11 STL, and
* the standalone Asio library. Your program need not use these namespaces if
* you do not need this sort of flexibility.
*/
#include <websocketpp/config/asio.hpp>
#include <websocketpp/server.hpp>
#include <iostream>
typedef websocketpp::server<websocketpp::config::asio_tls> server;
using websocketpp::lib::placeholders::_1;
using websocketpp::lib::placeholders::_2;
using websocketpp::lib::bind;
// pull out the type of messages sent by our config
typedef websocketpp::config::asio::message_type::ptr message_ptr;
typedef websocketpp::lib::shared_ptr<websocketpp::lib::asio::ssl::context> context_ptr;
void on_message(server* s, websocketpp::connection_hdl hdl, message_ptr msg) {
std::cout << "on_message called with hdl: " << hdl.lock().get()
<< " and message: " << msg->get_payload()
<< std::endl;
try {
s->send(hdl, msg->get_payload(), msg->get_opcode());
} catch (websocketpp::exception const & e) {
std::cout << "Echo failed because: "
<< "(" << e.what() << ")" << std::endl;
}
}
void on_http(server* s, websocketpp::connection_hdl hdl) {
server::connection_ptr con = s->get_con_from_hdl(hdl);
con->set_body("Hello World!");
con->set_status(websocketpp::http::status_code::ok);
}
std::string get_password() {
return "test";
}
// See https://wiki.mozilla.org/Security/Server_Side_TLS for more details about
// the TLS modes. The code below demonstrates how to implement both the modern
enum tls_mode {
MOZILLA_INTERMEDIATE = 1,
MOZILLA_MODERN = 2
};
context_ptr on_tls_init(tls_mode mode, websocketpp::connection_hdl hdl) {
namespace asio = websocketpp::lib::asio;
std::cout << "on_tls_init called with hdl: " << hdl.lock().get() << std::endl;
std::cout << "using TLS mode: " << (mode == MOZILLA_MODERN ? "Mozilla Modern" : "Mozilla Intermediate") << std::endl;
context_ptr ctx = websocketpp::lib::make_shared<asio::ssl::context>(asio::ssl::context::sslv23);
try {
if (mode == MOZILLA_MODERN) {
// Modern disables TLSv1
ctx->set_options(asio::ssl::context::default_workarounds |
asio::ssl::context::no_sslv2 |
asio::ssl::context::no_sslv3 |
asio::ssl::context::no_tlsv1 |
asio::ssl::context::single_dh_use);
} else {
ctx->set_options(asio::ssl::context::default_workarounds |
asio::ssl::context::no_sslv2 |
asio::ssl::context::no_sslv3 |
asio::ssl::context::single_dh_use);
}
ctx->set_password_callback(bind(&get_password));
ctx->use_certificate_chain_file("server.pem");
ctx->use_private_key_file("server.pem", asio::ssl::context::pem);
// Example method of generating this file:
// `openssl dhparam -out dh.pem 2048`
// Mozilla Intermediate suggests 1024 as the minimum size to use
// Mozilla Modern suggests 2048 as the minimum size to use.
ctx->use_tmp_dh_file("dh.pem");
std::string ciphers;
if (mode == MOZILLA_MODERN) {
ciphers = "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!3DES:!MD5:!PSK";
} else {
ciphers = "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA";
}
if (SSL_CTX_set_cipher_list(ctx->native_handle() , ciphers.c_str()) != 1) {
std::cout << "Error setting cipher list" << std::endl;
}
} catch (std::exception& e) {
std::cout << "Exception: " << e.what() << std::endl;
}
return ctx;
}
int main() {
// Create a server endpoint
server echo_server;
// Initialize ASIO
echo_server.init_asio();
// Register our message handler
echo_server.set_message_handler(bind(&on_message,&echo_server,::_1,::_2));
echo_server.set_http_handler(bind(&on_http,&echo_server,::_1));
echo_server.set_tls_init_handler(bind(&on_tls_init,MOZILLA_INTERMEDIATE,::_1));
// Listen on port 9002
echo_server.listen(9002);
// Start the server accept loop
echo_server.start_accept();
// Start the ASIO io_service run loop
echo_server.run();
}
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